发明名称 |
Adaptive feed-forward power amplifier linearization methods using adaptive filters |
摘要 |
A device may use enhanced power amplifier (PA) linearization techniques such as adaptive feed-forward (FF) linearization using adaptive filters. In one example, an adaptive feed-forward linearizer may isolate a distortion signal based at least in part on the signals input to and output from a PA in a transmission path. The distortion signal may be used to cancel distortion at the output of the PA to produce an improved output signal. A first adaptive circuit may be used to produce the distortion signal and a second adaptive circuit may be used to produce an error cancellation signal based at least in part on the distortion signal. The error cancellation signal may be amplified and re-introduced to the transmission path to produce the improved output signal. Semi-adaptive circuits may be used in place of the adaptive circuits, or a hybrid approach may be used. |
申请公布号 |
US9425837(B1) |
申请公布日期 |
2016.08.23 |
申请号 |
US201514866504 |
申请日期 |
2015.09.25 |
申请人 |
QUALCOMM Incorporated |
发明人 |
Hwang Insoo;Nguyen Cong;Lee Won-ick |
分类号 |
H03F1/32;H03F3/189;H04B1/04 |
主分类号 |
H03F1/32 |
代理机构 |
Holland & Hart LLP |
代理人 |
Holland & Hart LLP |
主权项 |
1. A method of wireless communication, comprising:
receiving a first signal at an input of a power amplifier (PA) in a transmission path of a wireless device; isolating a distortion signal based at least in part on the first signal received at the input to the PA and an output of the PA; producing an error cancellation signal using the distortion signal and the output of the PA; and producing a PA output signal with improved linearity by cancelling distortion at the output of the PA using the error cancellation signal. |
地址 |
San Diego CA US |